<!-- 7.html -->
<!DOCTYPE html>
<html>

<head>
  <style>
    div.card {
      width: 250px;
      box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
      text-align: center;
    }

    div.header {
      background-color: #4CAF50;
      color: white;
      padding: 10px;
      font-size: 40px;
    }

    div.container {
      padding: 10px;
    }
  </style>
</head>

<body>

  <h2>Cards</h2>

  <p>box-shadow 属性可用于创建类似纸质的卡片：</p>

  <div class="card">
    <div class="header">
      <h1>1</h1>
    </div>

    <div class="container">
      <p>January 1, 2021</p>
    </div>
  </div>

</body>

</html>